r+x=r

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Solution for r+x=r equation: 


Simplifying
r + x = r

Add '-1r' to each side of the equation.
r + -1r + x = r + -1r

Combine like terms: r + -1r = 0
0 + x = r + -1r
x = r + -1r

Combine like terms: r + -1r = 0
x = 0

Solving
x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Simplifying
x = 0

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